I have an electric sharpener, I think it is True Cut, and I love it. If you want your blades sharp, put a drop of oil on each stone and spread it all around with your finger before you sharpen one side of the blade. The oil will darken from the metal which was removed. Dab that dirty oil off both stones with a tissue, apply another drop of oil to each stone, spread that all around and dab it off again to make sure the stones are clean again. Now apply another drop of oil to the clean stones, spread that around and sharpen the other side of the blade. If you sharpen with clean stones which are unclogged with metal and clean oil, you will be pleased with your results. This takes a bit of time, to do this with each side of each blade you sharpen, but otherwise you'll just think the sharpener doesn't work and probably throw it away like many people do. I am a retired dental hygienist who used to hand sharpen my instruments and I know what I'm talking about.